Support request - cannot upload files with apostrophe

[Forex Station]

Support Request Template
What version of phpBB are you using? phpBB 3.2.3-RC2
What is your board's URL?
Who do you host your board with? Namecheap.com
How did you install your board? I used the download package from phpBB.com
What is the most recent action performed on your board? Update from a previous version of phpBB3
Is registration required to reproduce this issue? Yes
Do you have any MODs installed? No
Do you have any extensions installed? Yes
What version of phpBB3 did you update from? phpBB 3.2.1
What extensions do you have installed?
Adsense & Ads
Attachments files center
phpBB Media Embed PlugIn
Precise Similar Topics
Ravaio Configuration
Stop Forum Spam
Thanks for posts
What styles do you currently have installed? Ravaio by Gramziu
What language(s) is your board currently using? English
Which database type/version are you using? MySQL 5
What is your level of experience? New to PHP and phpBB
What username can be used to view this issue?
What password can be used to view this issue?
What actions did you take (updating your board; installing a MOD, style or extension; etc.) prior to this problem becoming noticeable? No changes to board, we've kept and used these extensions and haven't added anything else.
Please describe your problem. We cannot upload any files that contain an apostrophe ' in the name of the file. This was not happening before as we have files that have apostrophe's in them. It is only happening now and we need the ability to upload files as they are named as we host source codes for stock trading platforms which cannot be altered by name or they are unusable.
We have also tested the board in prosilver (preview mode from ACP) and we cannot upload those files either. A small yellow exclamation mark appears next to our uploaded file.
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Hi PhpBB team, we really need your help with an issue we have recently encountered. Our board URL and login details are not included in this support template for privacy reasons. Could you please kindly assist us further?
We can be contacted via PM for the missing details.

[Mick]

Are you talking about attachments?

You can try disabling your extensions to see if they are interfering, are they compatible with 3.2.3?.

Is your style compatible with 3.2.3?

[Forex Station]

Are you talking about attachments?

You can try disabling your extensions to see if they are interfering, are they compatible with 3.2.3?.

Is your style compatible with 3.2.3?

Thanks Mick for the quick response. We've fixed the issue with the help of our theme creator Gramziu who looked at our php logs. He found out that it was actually due to Modsecurity in cPanel which was blocking files that contained special characters so we contacted our host (namecheap.com) and they whitelisted characters in Modsecurity for us and now it works again!

Hopefully this helps others who come across the issue